Middlings-purifier



(No Model.) r 8 summe-sheen VI.

A. J. SEYLER.

. "MIDDLINGS PMPIER.

No. 255,036.' Patented Mar. 14.1882.l

SSheets-Sheet 3.

(No Model.)

. SEYLER.

. MIDDLINGS PURIPIER.

[Man 14.1882.

Patented N. PETERS.' Fham-Lnhngmphnn wnsninglun. D. C.

" UNITED STATES PATENT EEICE.

ANDREW J. SEYLER, OF CEDARVILLE, ILLINOIS.

MIDDLINGSl-PURIFIER.

SPECIFICATION forming part of Letters Patent No. 255,036, dated March 14, 1882,

Application tiled December 13, 1881.

To all whom it may concern Be it known that I, ANDREW J. SEYLER, of Cedarville, iu the county of Stephenson and State of Illinois, have inventedcertain new and useful Improvements in Middlings-Pnrifiers; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had `to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specitication, in which- Figurel is a side elevation; Fig. 2, a central longitudinal section; Fig. 3, an end elevation; Fig. 4, a view of the cut-oft' apron, and Fig. 5 a detail perspective view of the sieves and their frames.

My invention relates to certain novel improvements in middlings-pnriliers, which will be fully understood from4 the following description when taken in connection with the annexed drawings: i

The letter A designates the frame of the machine, which is suitably housed in by means of stationary and removable boards, hereinafter specially referred to.

C designates a fan-case mounted above the inclined sieves D and E at one end of the frame A, and containing a rotary fan, which receives its motion from a main driving-shaft, F, journaled in brackets on the said frame. The fan-case is provided with end openings, to which valves are applied forregulaiingthe force ot the currents through the machine. It is also provided with a discharge-spout, C', through which the light foreign matters separated from the middlings are discharged.

Gr designates a hopper, into which the middlings are fed; and G is an upright chest having a semicylindrical top, which is divided into an ascending passage, c, and a descending pas- (No model.)

adjustable valves c c, for regulating the induction currents ot' air, asindicated by the course of the arrows. Below the lower sieve, E, is a shoe, I, having inclined bottoms terminating in adischarge-spout, I', forthepurified middlings; and at therearextremityofthis shoeisaspout,l2,for the discharge of the seconds or impure middlings. The top and bottom sieves have cloths of different grades or degrees of tneness stretched on their fra-mes fg, so arranged that the finest cloth is nearest the front or highest ends of the screens and the coarsest cloth is nearest the rear ends of the same. Each one of the sieve-frames is fitted into grooves made in the inner sides of vibrating frames J, which are suspended by hangers li from the xcd boards ot' the housing of frame A.

The front transverse pieces, t', of the frames J are slotted partly through at the 'middle of their length to receive screws j, which. are fixed into the front cross-pieces of the sieve-frame. By means of thumb-nuts on said screws the sieve-frames can be screwed to the frames J, so that they will be rocked together. By this construction I am able to make the middlings on the screens travel fast or slow, according to the quality ot' the middlings acted on. To malte the iniddlings travel fast over the sieves, one or both, I loosen the thumb nut or nuts and push the frame J more or less toward the rear or tail end ot' the machine. rIhis throws the middlings up from and back on the cloth. The front ends of the central strips,p, of the screens are pressed against by springs jj, and the rear projecting ends of the said central strips are acted on by a vertical knocker, 7c, which is rigidly secured on one end of an arm, 7c', to the opposite end of which is pivoted lever K, fulcruined to the frame A at y. (See Fig. l.)

The upper or shorter arm ot' lever K is provided with an anti-friction wheel, m, which is acted upon by a prismatic tappet-wheel, L, keyed on the main driving-shaft F. By these means the sieves and the franiesJreccive rapid vibration longitudinally and give a slight tossing motion to-the` middlings while passing downward over thin cloths of ditt'erent degrees of lineness.

The shoe I, which is provided with the inclined bottoms for the firsts77 orpurited mid- IOO dlings, is attached to the fixed side boards of the housing by means of hangers h', and this shoe is connected by a rod, Z, to the lower arm of lever K, so as to receive vibration therefrom. A spring, s, fixed to a cross -picce ot' frame A, acts constantly against pin s on said shoe to give the forward strokes to it.

Between the two sieves D and E, and secured rigidly to the side housing of the frame A, are a series of chute-boards, N, which ineline backward in planes parallel to each other, and are arranged equidistant from each other, with their lower edges in close relation to the bottom sieve.

Beneath the rear part of the bottom sieve, E, I arrange a flexible im perforate apron, O, one

l end of which is secured to a horizontal roller,

m', and the other end is attached to a transverse slat, n, one end of which Fis exposed to View on the outside of the housing. This slat n is attached by narrow Hexible strips 0 O to another roller, m2. The two rollers have ratchet-wheels r on their outer exposed ends, with which pawls r engage for preventing the rollers from turning. The apron O is equal in width to the width of the sieve E, and of a length sufficient when unwound from roller m to reach as far as the roller m2 and form a cut-off for the material which falls from about two-thirds of the rear portion of the screen E. This apron and its rollers vibrate with thelower frame, J, and when the apron is fully wound on roller m all ofthe material passing through the lower screen will fall upon the inclined bottom of the shoe I and pass off through the discharge spout I. By unwinding the said cut-off apron O more or less all the middlings sifting through the bottom sieve, E, from the indicator n to the tail of this screen will fall on the apron and be discharged from it into the spout I2 as second niiddlings. By these means a very nice separation of the different grades of iniddlings is obtained. The bran is discharged from the tail ends ofthe screens D and E into a spout, Q.

I will now briefly describe the operation.

The middlings are fed into the hopper G, from which they pass into the upward air-passage, a. As they leave hopper Gr they are caught by a current of air, en tering passages a and b under the hopper and passing up and over an adjustable valve, a3, thence down through passage of, and upward over the board H tothe fan-case C. The middlings, as they pass into the lower end of the passage a, have applied to them a very strong blast, and if any are carried over the valve t3 into passage a they will be thrown down on the sieve D in front of board H, and nothing but the light useless matters will be carried over this board to and discharged from thefan-case. The middlings which are too heavy to be carried by the air-currents fall down the chuteA b and are delivered on the front part of the top sieve, D. As the middlings which sift through this top sieve fall upon the inclined chutes N they are directed by the latter backward or toward the head of the second sieve, E, the same distance they traveled toward the tail end of the top sieve.

By having the sieve-frames clothed with tine cloth at the end where theiniddlings are first fed into them and graded from these points to the tails coarse enough to let all of the middlings through, and combining with these sieves the chutes N, it will be seen that themiddlings in passing through a given section 'of the top sieve are partly relieved of their impurities, and, falling on chutes N, are carried toward the head ot' the second or lower sieve and go through the saine process on liner cloth.

That I claim as new, and desire to secure by Letters Patent, is-

l. The combination of the feedhopper G, theupright passages a a', and valve a3 therein, the air-inlet passage b, the chute b', the board H, the shaking-sieve D, and a suction-fan, substantially as described.

2. The combination'of the shaking-sieve frame, a cross-strip fixed toits head, the shaking-frame J, a slotted cross-strip fixed to its head, the bolt j, the bindingenut for securing the two frames together, and means for shaking the latter, substantially as described.

3. The combination of the stationary incliued chutes N, the shaking-sieves arranged v above and below said4 chutes, the valves c c, at or below the heads of the sieves, an adjustable grading device, o, below the sieve E, and a suction-fan, G, substantially as described.

4. The lcombination ot' the shaking-sieves, the hangers thereof, the knocker k, its arm k', lever K, anti-friction wheel n1, and tappetwheel L, substantially as described.

5. rlhe combination ota liexible rolling cut oft' apron adjustable at one end, as described, with the shaking-screen E, the lower end of said apron terminating near the lowerend ot' said screen, the later-ally-discharging spout I2, and the shaking-slice I, all substantially as and for the purpose set forth.

6. The combination of the cut-off apron O, its rollers m m2, strips O' O', ratchet-wheel r', pawls r', strip a, pointer u', and a shakingv screen, substantially as described.

In testimony that I claim the foregoing as myown I affix mysignaturein presence of two witnesses.

ANDREW J. SEYLER.

Witnesses:

SAMUEL ROSENBERGER, LoUrs H. SMITH.

IOO

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